Method of sealing



July 3, 1934. H. J. NEUMILLER METHOD OF SEALING Filed Feb. 2. 1951 3 Sheets-Sheet l y 1934. H. .1. NEUMILLER 1,964,959

METHOD OF SEALING Filed Feb. 2, 1931 3 Sheets-Sheet 2 July 3, 1934.

H. J. NE UMiL LER 1,964,959

METHOD OF SEALING Filed Feb, 2, 1931 3 Sheets-Sheet 3 iwmgg I Patented July 3, 1934 UNITED STATES PATENT; OFFICE METHOD OF SEALING Ware Application February 2, 1931, Serial No. 518,045

16 Claims.

This invention has reference to the method of making containers, wrappers or packages comprising the use of a transparent cellulose material having a moistureproof coating or combined with a moistureproofing composition. More particularly it relates to the sealing of the containers, wrappers or packages to render them advantageous in the merchandising of various articles of trade, as for instance, cigars, tobacco,

coffee, tea and edibles wherein it is desired that the sealed end will withstand loading, Weight of material loaded, and the strains to which the sealed end will be subjected in the ordinary handling of the filled containers, wrappers or packages.

The invention has for its object the method of producing sealed containers from a continuous sheet or strip of transparent moistureproof cellulose material which consists in continuously 2O feeding forward the sheet or strip and forming the said sheet or strip into package-like form with preferably plicated sides and overlapped edge portions; applying a treating medium, as for example, a solvent, such as acetone, to one face of one of said overlapped edge portions and applying pressure with heat to said overlapping portions for effective sealing of the said portions; severing the material so formed into selective length containers; applying a treating medium, as for example, a solvent, such as acetone, to the edge of one of the open ends of the container and also to the inner and outer surface portions adjacent thereto for a predetermined or selective length thereof; folding over the end of the container to which the medium has been applied and applying pressure with heat to the end so folded whereby to cause the folded end to be sealed between the surfaces of its plicated sides and between the adjacent surfaces of such folded surfaces and during the steps of folding and applying pressure with heat, undulating the exposed surfaces of the said folded portion whereby to strengthen the folded and sealed end.

The scope of the invention comprehends the application of the treating medium whereby to create a mergeable condition for sealing the container which may be applied so that by capillarity the surfaces of the container to be sealed may be effectively treated; or such treating medium may be applied directly to the surfaces of the container and this holds true whether in the direct application of the medium it is applied to the interior surfaces or to the exterior surfaces, or both, depending on whether or not it is desirable when sealing the container to fold over the treated portions thereof which are to be sealed. If the sealing is to be accomplished by applying the medium and depending on capillarity for the spreading or flow of the medium over the inner and outer surfaces of the container, it is preferable to apply the medium to the end of the container and then by capillarity such medium will be caused to predeterminately cover and treat the surfaces to be sealed. If the sealing is to be accomplished by the direct application of the medium to the surfaces, such medium, by suitable means may be applied directly to the interior surfaces of the container and to the exterior surfaces thereof, if desired, and for a predetermined distance and to the end of the container. With such application, it is obvious that by the application of the medium direct to the interior surfaces of the container the end thereof may be sealed with or without the folding over of such treated portions. However, since I prefer to fold over the end of the container, so treated, and thereby strengthen such sealed end, I deem it a better practice to apply the medium directly to the inner and outer surfaces as well as the end of the container. It should, therefore, be apparent that in the application of the medium to the container for sealing, it should be viewed in a generic sense rather than a limited sense, since certain modifications, as I have indicated, may be resorted to within the scope of thedisclosure and within the scope of the claims appended hereto.

The trade is at present familiar with two types of cellulose material; one known as plain transparent material and the other, involved herein and known as moistureproof material. The lat ter is a cellulose material combined with a moistureproofing composition. Attempts have been made in the use of this moistureproof material to fuse the composition on the plies or layers of 0' the material, but without any great success due to the ineffectiveness of fusing the composition, with the result that containers so sealed will not withstand filling during handling nor the pres sure due to weight of material placed in the con- 100 tainers and the sealed ends thereby break away.

It is not to be understood, however, that the cellulose material itself is considered too fragile, for such is not the case. I am merely making reference to the fact that fusion of the moisture- 10.3 proofing composition is not effective nor sufficient for the purpose of a seal.

I have discovered that in the use of the moistureproof material for the making of containers and the sealing of an end thereof that a very 110 strong and effective bond and seal may be providcd by applying a treating medium, as for example, a solvent, such as acetone, to the plies or layers of the container, which it is intended to seal and that the application of the solvent will soften or liquefy the moistureprooflng composition of the cellulose material, with the result, that the plies or layers of the material will thereby become firmly held together by the merging and adherence of the moistureprooflng composition. This merging of the composition is accentuated and intensified by applying pressure with heat. The pressure being desirable since the material is folded on itself to provide a sealed end and pressure will aid in the setting of the turned over portions and the heat acts to evaporate excess solvent with the attending result that the seal may be quickly and effectively made. It is, therefore, an object of the invention to use as a base material for the containers a moistureproof cellulose sheet and employ a solvent, such as acetone, to soften or liquefy the composition on the sheet whereby when the step of sealing is being made the plies or layers of the material may be firmly and effectively held together by the merging and adherence of the moistureproofing composition. I have further discovered by undulating the surfaced portions which form the sealed end of the container increases the bonding action through the merging of the moistureproofing composition.

The invention further comprehends the scoring of the body of the containers at a predetermined point from the open end of the containers to be sealed whereby to facilitate the folding over of a predetermined length of the container ends to be sealed and finally after the containers have been completed with sealed ends having imprinted thereon a marking to designate the distributor, user and/or trade name, or other marking as may be desired.

Other and further objects will more fully appear from the following description.

This application is a continuation, in part, of my copending application filed September 8th, 1930, hearing Serial No. 480,362.

That the invention may be more fully understood, reference is had to the accompanying drawings illustrating a preferred embodiment of the invention, in which:

Fig. 1 is a plan view showing a strip of the cellulose material and several of the steps which are performed in the shaping of the material and before the severance of the lengths of the container shapes therefrom;

Fig. 2 is a side elevation of Fig. 1;

Figs. 1 and 2 illustrate extensions of Figs. 1 and 2 to show a portion of the material formed and sealed in container shape and before the selective container lengths have been severed and an end folded and sealed;

Figs. 1 and 2 show in plan and elevation sevcred lengths of containers, partly broken away as these lengths may have any predetermined length and width when severed from the formed material;

Fig. 3 is a transverse sectional view of a selective width of the cellulose material from which one form of container may be made;

Fig. 4 is a cross-section as the same would appear if taken on the line 4-4, Fig. 1, illustrating a first step in the formation of a specific type of container as shown in Fig. 19;

Figs. 5, 6 and '7 are cross-sections as the same would appear if taken on the lines 5-5; 66; and

7-7, respectively, of Fig. 1, and illustrate successive steps in the method of forming the material into container shape and particularly one such as shown in Fig. 19;

Fig. 8 is a cross-section as the same would appear if taken'on the line 8-8 of Fig. 1, and is representative ofthat portion of the formed length of material where the treating medium is applied to one of the overlapping edges of the formed material included in the step of sealing such edges;

Fig. 9 is a cross-section as the same would appear if taken on the line 99, Fig. 1, and illustrates the form the material assumes for a specific type of container and the sealing of the overlapping edges;

Figs. 10 and 11 are plan views, respectively, of the formed material in a specific type of container showing scoring in the one instance for determining the extent of application of the treating medium and the length of the folded over end portions which is to be sealed and in the other instance the scoring as well as the initial applying of the medium to the end of the con tainer, which said medium as illustrated in Fig. 12, by capillarity, covers the scored end of the container;

Fig. 12 is a perspective of the end of a severed container length before the end to be sealed is folded over and showing the treating medium applied thereto;

Fig. 13 is a view showing the end of the container to be sealed with a treating medium applied thereto and a step in the method where an additional amount of treating medium is applied to the surface which is folded over when the end of the container is folded to be sealed;

Fig. 14 is a view of the end of the container to be folded with the treating medium applied and before the fold is made;

Fig. 15 is an end view of Fig. 14;

Fig. 16 is a view of the medium treated end of the container when folded over and just prior to or simultaneous with the step of applying pressure with heat, whereby to set the folded end and to seal by the merging of the coatings treated with the medium and when the excess treating medium is evaporated by the heat to insure quick sealing;

Fig. 17 is a detail of the completed folded and sealed end of a container after having its surfaces undulated whereby to strengthen and reinforce said folded and sealed end;

Fig. 18 is an end view of Fig. 1'1;

Fig. 19 is a perspective view of a specific type of container especially adapted for receiving a single piece of merchandise, as for example, a cigar, and having a folded and sealed end, overlapping sealed portions and plicated sides;

Fig. 20 is a plan view of a container such as shown in Fig. 19 on which has been applied or imprinted the name of a manufacturer or distributer or specific trade name branding;

Fig. 21 is a detail in plan illustrating in a more or less diagrammatic way a means for applying the treating medium to the edge end portions of the containers and wherein capillarity is relied upon for the surface treating of the moistureproofing composition with said medium;

Fig. 22 is an elevation partly in section of what is shown in Fig. 21;

Fig. 23 is a detail in plan, partly in section, as well as in full and in dotted lines, showing a means for applying the treating medium directly to the interior and exterior surfaces of the containers for a predetermined length of each container and to the edge end portions thereof for surface treating of the moistureproofing composition thereon;

Fig. 24 is an elevation of the elements shown in Fig. 23, partly in section and wherein the means for treating the surfaces and edge end portions of the containers are shown in treating position in relation to a container;

Fig. 25 is a cross section as the same would appear if taken on the line 25-25 of Fig. 23, looking in the direction of the arrows, and illustrates the components of the means for applying directly the treating medium to the containers and with the respective elements of the said means in non-applying positions in relation to a container, and

Fig. 26 is a cross section, as the same would appear if taken on the line 26-26, of Fig. 24, in which position of the elements the means for applying the treating medium to the containers are shown in applying position in relation to a container.

Attention is called to the fact that the cellulose strip or sheet is very, very thin and that the views illustrating not only the completed article itself but the various steps in the formation of the same from a sheet or strip are somewhat out of proportion which is made necessary whereby to graphically illustrate the sheet or strip, the various steps and the overlying or folded over portions of the material during the process of forming containers from the sheet material.

Like characters of reference denote corresponding parts throughout the figures.

I desire to call attention to United States Letters Patent to Charch et al. No. 1,737,187, dated November 26th, 1929, for a Moistureproof material for the purpose of identifying the general nature of moistureproof material from which the containers are produced by the method therein described and the coating of which therein identified, which is employed when treated with the solvent for sealing by merging of the coating which is softened or liquefied by the application of such solvent.

In Figs. 1, 1 2 and 2*, considered together as diagrammatic plan views and elevations, show the strip or sheet 1 of preferably moistureproof coated cellulose material supplied preferably in continuous length from which the completed container in Fig. 19 is made by a series of successive steps during the movement of the sheet or strip 1 in a forward direction. The formation of the sheet or strip 1 into container shape, as for example, that shown in Fig. 19, (which is illustrative only and not intended as limiting the shape or design of container to be made) is brought about by the material being formed over a mandrel or other suitable former from a flat strip or sheet to the container-like form as it appears in Figs. 1 and 2 I have elected to show the material during the formation thereof into container shape as being formed with the plicated sides 2. This form is desirable but not necessarily essential since containers may be made without plicated sides, as will be understood.

The several steps in the formation of the material into container shape and from which selective container lengths are severed as best seen in Figs. 1, 2, 4, 5, 6 and. 7, which will produce a container shape having the plicated sides 2 and the overlapping portions 3 and 4 to provide the longitudinal seam which is sealed throughout the length of the container, as shown in Fig. 9. To provide the seal for the overlapping portions 3 and 4, there is applied to the under surface of the portion 4 during the movement of the sheet or strip 1 and the formation thereof, a treating medium, as for example, a solvent 5, such, for instance, as acetone. The solvent being applied direct to the coated surface of the material will soften or liquefy the coating and an effective seal made between the contiguous surfaces of the portions 3 and 4 by bringing the surfaces into juxtaposition and applying pressure thereto to make the seal effective by the merging of the coating on the contiguous surfaces of the portions 3 and 4. Heat is preferably applied with the pressure which acts to evaporate excess solvent and insure the quick setting and sealing of the merged coating. The steps described in the formation of the sheet or strip 1 to container shape is successively and progressively carried on during the forward movement of said sheet or strip material and following the step of sealing the overlapping portions 3 and 4, containers of selective length are severed from the shaped material. Such lengths are shown, although broken away, in Figs. 1 2 10 and 11 and the point of severance is indicated at 6 between the Figs. 1 and 1 and between the Figs. 2 and 2 I prefer after the severance of the container lengths from the formed or shaped material to move the container lengths in a direction transverse to the movement of the sheet or strip during the forming operations thereof. This movement is illustrated by the arrangement shown in Figs. 1 and 2* and Figs. 1 2 10 and 11. As the individual container lengths are moved they are preferably scored at 7 at a predetermined distance from one open end of such containers and the said scoring is indicative of the point of folding the end 3 of the container on itself whereby to provide the sealed end. Following the scoring step and while the containers are in movement, a treating medium, as for example, a solvent 9, such as acetone, is applied to the edge of the open edge portion 8 of the respective containers which by capillarity creeps in. along and over the interior and exterior surfaces of the end portion 8 of the container, the solvent wetting the innermost creases and crevices formed by the plies or layers of the container in the collapsing and folding thereof; the solvent application being sufficiently light in quantity to insure the capillary action not carrying the solvent beyond the scoring 7. This solvent is applied just preceding the step of folding over the end 8 on the scoring 7 and is for the purpose of softening or liquefying the moistureproof coating on the plies and surface portions of the portion 8 of the containers so that when the portion 8 is folded over, and it is immediately, and by applyin pressure the contiguous surfaces of the material which are pressed into juxtaposed relation are firmly sealed and held to ether by the mer ing of the softened or liquefied coating. I prefer when applying the pressure to apply it with heat which latter is employed to evaporate excess solvent and thereby bring about a quickening in the step of forming and completing the seal. During the application of pressure with heat I preferably undulate the exposed surfaced portions of the seal as at 10 which not only creates a better bond but gives added strength and stiifens the said sealed end.-

I have previously pointed out that in Fig. 19

there is illustrated a specific form of container. This form will receive articles of merchandise but has been designed preferably for holding a single cigar and when the container is so filled its open and unsealed end may be folded over as is now a common practice. Referring to Figs. 13, 14, 15 and 16 it is to be observed that on one surface of the container there is shown a greater thickness or quantity of the solvent application designated 11. This applied solvent is not dependent upon capillarity in the solvent applied to the end edges of the container but is purposely applied so that immediately when the treated end if folded over and brought into contact with the untreated solvent surface of the body of the container there will be a sufficient solvent between these contiguous surfaces whereby to soften the coating on both the treated solvent coated surface and unsolvent treated surface to insure a mergence and effective adhesion between the merged moistureproof coatings thereon. Such seal is made the more effective by the application of pressure to the folded ends which acts also to set the folded ends and by applying heat with the pressure the excess solvent will be evaporated and insure a quick seal.

In Figs. 21 and 22, I have shown a means by which the treating medium or the solvent may be applied to the edge of an end of the containers. This means, which is more or less a diagrammatic showing, comprises a rotatable member A carried and operated by a shaft B which will receive its power from a suitable source not shown. The rotatable member has a treating surface a operative in'association with a receptacle C adapted to contain a suitable quantity of the treating medium or solvent. In the said two figures portions of containers are shown with arrows indicating their direction of movement which will cause the edge end portions of the containers to move across the revolving and applying surface a of the member A and during such movement the member A will apply the treating medium or solvent to the edge end portions of the said containers, as will be obvious from an examination of these figures. With this method of applying the solvent, the solvent by capillarity is carried over the interior and exterior surfaces of the containers in the manner and for the purposes hereinabove set forth.

The movement of the ends of the containers across the revolving surface of the member A tends to turn the treated ends of the said containers. as shown in Figs. 13 and 22, without any injurious effect, as such ends will again assume the flat position shown in Fig. 14, when the treated ends of the said containers are folded over as indicated in Fig. 16.

In Figs. 23 to 26, both inclusive, I have shown a means for applying the treating medium or solvent directly to the interior and exterior surfaces of the ends of containers for a predetermined length and also for applying the said medium or solvent directly to the edge of the ends so treated. These figures illustrate the means I employ in a more or less diagrammatic way and they together show successive steps for so applying the medium or solvent directly to the containers, also, this means to which I make reference includes the introduction of a draft or blast of a suitable gaseous medium for expanding the ends of the containers whereby the said means may be moved into association with the expanded ends of the containers whereby to apply the said medium or solvent. The means referred to includes the component elements D, E and E and F and F and the applying surfaces of these elements and the bodies thereof, if desirable, are of a saturable, absorbent or equivalent material to which may be supplied the treating medium or solvent and when so supplied be capable of transferring through the surfaces thereof the said medium or solvent whereby the latter may be directly applied to the surfaces of the container brought into contact therewith. The application of the treating medium or solvent is more or less instantaneous so that operations may be expeditiously carried on and during the movement or transference of the containers from the point of formation to the completion at the conclusion of the surface treating step. The element D has a cross sectional design with an outline in cross section comparable to the plicated or bellows shape of the containers and the elements E and E likewise have a cross sectional configuration complementary to the element D and to the plicated or bellows sides of the con-' tainers so that there may be a coaction between these said elements and a container, as for 1nstance, in the manner shown in Fig. 26 when they are in medium or solvent applying position in relation to a container. The element D is provided with a surface abutment (1 extending therearound of like material on its surface and body structure as the element D and functions both as a limiting element for determining the extent of movement of the element D into the containers by engagement with the end edge of the containers as best seen in Fig. 24, and also for directly applying the treating medium or solvent to the edge end of the containers. This abutment should preferably be adjustable longitudinally on the element D so as to have variable positions thereon, at the will of the operator, or as may be found expedient in manufacture whereby the position of the element D in the containers may be varied and thereby change the length of the surface treatment within the containers from the edge end thereof. These elements D, E and E constitute together a unit sufficient to treat certain of the surfaces of the containers and when it may not be deemed desirable to fold over the sealed ends of the containers. Since this practice may be varied and it may be found expedient and desirable, as it is in many instances, to include in the sealed ends of the containers the folded over end portions, I include as elements of this unit the parts F and F, the former having a configuration to adapt it to the longitudinal seam of the containers, see Figs. 25 and 26, and the latter element shown adapted by its configuration to the flat surface of the containers.

The element D is carried by a supporting element G which may be operated from any suitable source not shown, whereby it may have reciprocal movement to move it, as for example, from the full to the dotted line positions shown in Fig. 23 and again retracted and a predetermined side-wise movement, as operating conditions may require or demand to insure proper coaction with the containers as they are moved. The head H of the element D is preferably of conical shape to facilitate its easy insertion into the ends of the containers as they are expanded and such expansion is accomplished by providing the head H with a jet or nozzle h in communication with a duct h extending through the supporting element G which would have communication with means, not shown, for supplying a gaseous medium for the expansion of the ends of the containers. Such expansion results from the gaseous medium discharged through the head H, as will be understood. The introduction of the gaseous medium to the containers for the expansion thereof may be under manual or automatic control, as may be desired. The step of expansion of the ends of the containers is of course properly timed in relation t0 the forward movement of the several elements D, E, E, F and F and likewise the supplying of these respective elements with the treating medium or solvent may be under a suitable time control, as may be expedient or necessary and the treating medium may be supplied through tubular members, I and I connected with the element D; the tubular members J and J connected with the elements E and E and the tubular members K and K connected to the elements F and F and each of the respective tubular members designated are provided within the respective elements to which they are connected with a plurality of small openings or perforations L, see Fig. 24, through which the treating medium may be discharged for the purpose of supplying the treating medium or solvent to the respective elements herein designated, and which are employed for the direct application of the treating medium or solvent to the surface portions of the containers to be so treated. It will be observed on examining Figs. 25 and 26 that the element F has connected or associated therewith a plurality of the tubular members K whereby to supply the necessary additional amount of treating medium or solvent, at 11 heretofore explained and designated. In Figs. 23 and 24, I have shown the elements F and F respectively, connecting with operating parts M and M and although the elements E and E are not shown as having similar operating connections, it is to be understood that they have connected thereto substantially operating connections so that the desired and required movements may be obtained. Furthermore, in an assembly of these respective elements D, E, E F and F they will be connected for a timed operation in relation to each other whereby to effectively accomplish the results herein sought.

The operating assembly is not shown and it is not deemed necessary to show it because the structure embodying the assembly is not the subject of this invention and no claims are directed in this application thereto.

In the sequence of operation of the elements shown in Figs. 23 to 26, both inclusive, the said elements have first a forward movement to transfer them to the full line position to the substantial dotted line position shown in Fig. 23. During this movement the gaseous medium is ejected from the element D whereby to expand a container and allow for the element D to enter the end of the container. When this step is accomplished the respective elements E, E, F and F are moved into contacting relation with the container so that the complementary configurations of all of the said elements may be brought into coactive relation with a container for the direct application of the treating medium or solvent to the surfaces of the container and when in such coacting relation the treating medium or solvent is applied through the surfaces of these ele ments then in juxtaposed relation with the sur faces of the container, as illustrated in Fig. 26 on the application of the treating medium or solvent, which is done very quickly, the said elements through which the medium or solvent is applied are then moved or retracted to their nonoperating positions, which is the position in which the parts are shown in Figs. 23 and 25 preparatory to their acting on the next and succeeding container. These steps of operation are carried on successively and in timed relation to the movement of a plurality of containers and. continued so long as there are containers to be treated.

It should be obvious from the foregoing description that the means described, shown in Figs. 23 to 26, both inclusive, will produce the results exhibited by Figs. 12, 13 and 14, that is to say, by direct application the treating medium or solvent may-be applied directly to the interior and exterior surfaces of the containers for a predetermined length and the necessary medium or solvent applied to a portion of an exterior sur face for effective sealing when the treated ends are folded over.

On the completion of the container having the folded and sealed end, as shown in Fig. 19, the containers may be successively passed beneath or over a suitable branding device where the name of the manufacturer or distributor may be applied, as shown in Fig. 20, or a suitable marking, as for example, a trade name may be imprinted on the surface of the container.

By the application of a solvent, such for instance, as acetone, tothe surfaces of a cellulose sheet or strip of the type hereinabove referred to, the solvent acts to soften and dissolve the moistureproofing composition combined with the cellulose material resulting in the composition forming an adhesive which, when the treated surfaces are brought into contiguous relation, the softened and dissolved composition, being the adhesive, merges or interpenetrates and forms a seal, with or without ressure, but when pressure is applied will accent ate the seal which is naturally desirable in a continuous operation as herein pointed out. Heat, when applied with the pressure, as pointed out, acts as an evaporator for the solvent and thereby further hastens or speeds up the sealing operation.

I desire to point out that instead of applying a solvent with heat and pressure, as described, an adhesive may be used. This adhesive may be nitro-cellulose, with or without added gums, waxes and plasticizers or other materials dissolved in a suitable solvent, such as acetone. When such an adhesive is used, the heating operation may be omitted since an excess of solvent is not present. preferably have a softening action on the moistureproof composition to secure better adhesion of the treated surfaces due to a better merging or interpenetration of the composition and adhesive. amounts of some or all of the constituents of the moistureproof composition or other suitable adhesive material dissolved in it.' The amount should be insufficient to prevent the capillary action previously referred to.

I will not claim herein my invention comprising, broadly, a wrapper or container having its reinforced and sealed end corrugated and created in the absence of the use of a direct application of a treating medium to the internal moistureproofing composition inasmuch as such an article and the method of its production more properly constitutes subject matter for claims in my companion application, Serial No. 470,483, filed July 24th, 1930; nor will I claim herein my invention The solvent in the adhesive should The solvent may have varying Gil comprising broadly the method of producing the article involving the specific use of ,a solvent in the treating of the moistureproofing composition inasmuch as such method constitutes subject matter claimed in my companion application, Serial No. 480,362, filed September 8th, 1930.

What I claim is:--

1. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing composition comprising applying a treating medium directly on the inner area to be sealed together at said end to create a mergeable condition on the said inner area of said end, and then pressing said end together to cause the moistureproofing composition on opposite faces of said end to merge whereby the end will be completely sealed.

2. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing composition comprising the collapsing of the tubular wrapper to give the same an initial flat condition, then opening the end portion thereof and applying a treating medium interiorly of said open end portion to said moistureproofing composition to create a mergeable condition on the inner face of said end, and then pressing said end together to cause the moistureprooflng composition on opposite faces of said end to merge whereby the end will be completely sealed.

3. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing composition comprising applying a treating medium directly on the inner area to be sealed together at said end and on an outer area of said end to create a mergeable condition on the directly treated surfaces of said end, and then folding over the treated end upon the body of the wrapper and pressing the same together to cause the directly treated moistureproofing composition on opposite faces thereof to merge throughout and cause said folded over portion to be secured to the body of the wrapper whereby the end of the wrapper will be completely sealed.

4. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing composition comprising applying a treating medium directly on the inner area to be sealed together at said end and on an outer area of said end to create a mergeable condition on the directly treated surfaces of said end, and then folding over the treatedend upon the body of the wrapper and pressing the same together to cause the directly treated moistureproofing composition on opposite faces thereof to merge throughout and cause said folded over portion to be secured to the body of the wrapper whereby the end of the wrapper will be completely sealed, and strengthening said sealed end by forming the same and adjacent body portion into a multiplicity of closely related corrugations thereacross interfitting the end and body portion together.

5. The method of sealing the end of a tubular wrapper formed of material coated with a moistureprooiing composition comprising applying a treating medium directly on the inner area to be sealed together at said end and on an outer area of said end to create a mergeable condition on the directly treated surfaces of said end, and then folding over the treated end upon the body of the wrapper and pressing the same together to cause the directly treated moistureproofing composition on opposite faces thereof to merge throughout and cause said folded over portion to be secured to the body of the wrapper whereby the end of the wrapper will be completely sealed, and strengthening said sealed end by forming the same and adjacent body portion into a multiplicity of closely related corrugations thereacross interfitting the end and body portion together, and evaporating an excess of the treating medium while subjecting the latter to a quickly effective evaporating medium.

6. The method of sealing the end of a tubular I wrapper formed of material coated with a moistureproofing composition comprising the collapsing of the wrapper to flatten the same, blowing open the end of the wrapper, and applying a treating medium interiorly of said open end and upon said moistureprooflng composition to create a mergeable condition on the inner face of said end, and then pressing said end together to cause the moistureproofing composition on opposite faces of said end to merge whereby the end will be completely sealed.

'7. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing compositioficomprising the collapsing of the wrapper to flatten the same, blowing open one end of the wrapper, applying a treating medium exteriorly and interiorly of said end and upon said moistureproofing composition to create a corresponding interiorly and exteriorly mergeable condition on the inner and outer faces of said end, and then pressing said end together and folding the same over onto the body to cause the mistureproofing composition of adjacent faces to merge whereby the end will be completely sealed and secured.

8. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing composition comprising applying a solvent directly on the inner area to be sealed together at said end to create a mergeable condition on the inner face of said end and then pressing said end together to cause the moistureproofing composition on the opposite faces of said end to merge, whereby the end will be completely sealed.

9. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing composition comprising the collapsing of the tubular wrapper to give the same the initial flat condition, then opening the end portion thereof and applying a solvent interiorly of said open end to said moistureproofing composition to create a mergeable condition on the inner face of said end and then pressing said end together to cause the moistureproofing composition of the opposite faces of said end to merge, whereby the end will be completely sealed.

10. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing composition comprising applying a solvent directly on the inner area to be sealed together at said end and on an outer area of said end to create a mergeable condition on the directly treated surfaces of said end, and then folding over the treated end upon the body of the wrapper and pressing the same together to cause the directly treated moistureproofing composition on opposite faces thereof to merge throughout and cause said folded over portion to be secured to the body of the wrapper whereby the end of the wrapper will be completely sealed.

11. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing composition comprising applying a solvent directly on the inner area to be sealed together at said end and on an outer area of said end to create a mergeable condition on the directly treated surfaces of said end, and then folding over the treated end upon the body of the wrapper and pressing the same together to cause the directly treated moistureproofing composition on opposite faces thereof to merge throughout and cause said folded over portion to be secured to the body of the wrapper whereby the end of the wrapper will be completely sealed, and strengthening said sealed end by forming the same and adjacent body portion into a multiplicity of closely related corrugations thereacross interfitting the end and body portion together.

12. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing composition comprising applying a solvent directly on the inner area to be sealed together at said end and on an outer area of said end to create a mergeable condition on the directly treated surfaces of said end, and then folding over the treated end upon the body of the wrapper and pressing the same together to cause the directly treated moistureproofing composition on opposite faces thereof to merge throughout and cause said folded over portion to be secured to the body of the wrapper whereby the end of the wrapper will be completely sealed, and strengthening said sealed end by forming the same and adjacent body portion into a multiplicity of closely related corrugations thereacross interfitting the end and body portion together, and evaporating an excess of the treating medium while subjecting the latter to a quickly effective evaporating medium.

13. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing composition comprising the collapsing of the wrapper to flatten the same, blowing open the end of the wrapper, and applying a solvent interiorly of said open end and upon said moistureproofing composition to create a mergeable condition on the inner face of said end, and then pressing said end together to cause the moistureproofing composition on opposite faces of said end to merge whereby the end will be completely sealed.

14. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofingcomposition comprising the collapsing of the wrapper to flatten the same, blowing open one end of the wrappen-applying a solvent exteriorly and interiorly of said end and upon said moistureproofing composition to create a corresponding interiorly and exteriorly mergeable condition on the inner and outer faces of said end, and then pressing said end together and folding the same over onto the body to cause the moistureproofing composition of adjacent faces to merge whereby the end will be completely sealed and secured.

15. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing composition comprising the collapsing of the wrapper to flatten the same, expanding the end of the wrapper, and applying a solvent interiorly of said open end and upon said moistureproofing composition to create a mergeable condition on the inner face of said end, and then pressing said end together to cause the moistureproofing composition on opposite faces of said end to merge whereby the end will be completely sealed.

16. The method of sealing the end of a tubular wrapper formed of material coated with a moistureproofing composition comprising the collapsing of the wrapper to flatten the same, expanding one end of the wrapper, applying a solvent exteriorly and interiorly of said end and upon said moistureproofing composition to create a corresponding interiorly and exteriorly mergeable condition on the inner and outer faces of said end, and then pressing said end together and folding the same over onto the body to cause the moistureproofing composition of adjacent faces to merge whereby the end will be completely sealed and secured.

HARRY J. NEUll/IILLER. 

